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Track which event handlers we add to the mqtt client so we can removed them cleanly

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Phil Day 2022-05-06 15:29:42 +01:00 committed by Steve-Mcl
parent 3be75fa822
commit 02d9ad479d
2 changed files with 41 additions and 14 deletions
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4
package.json
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@ -84,8 +84,8 @@
"bcrypt": "5.0.1"
},
"devDependencies": {
"dompurify": "2.3.5",
"grunt": "1.4.1",
"dompurify": "2.3.6",
"grunt": "^1.5.2",
"grunt-chmod": "~1.1.1",
"grunt-cli": "~1.4.3",
"grunt-concurrent": "3.0.0",

51
packages/node_modules/@node-red/nodes/core/network/10-mqtt.js vendored
View File

@ -391,6 +391,7 @@ module.exports = function(RED) {
node.options = {};
node.queue = [];
node.subscriptions = {};
node.clientListeners = []
/** @type {mqtt.MqttClient}*/ this.client;
node.setOptions = function(opts, init) {
if(!opts || typeof opts !== "object") {
@ -658,9 +659,9 @@ module.exports = function(RED) {
node.serverProperties = {};
node.client = mqtt.connect(node.brokerurl, node.options);
node.client.setMaxListeners(0);
let callbackDone = false; //prevent re-connects causing node.client.on('connect' firing callback multiple times
let callbackDone = false; //prevent re-connects causing node._clientOn('connect' firing callback multiple times
// Register successful connect or reconnect handler
node.client.on('connect', function (connack) {
node._clientOn('connect', function (connack) {
node.closing = false;
node.connecting = false;
node.connected = true;
@ -692,7 +693,7 @@ module.exports = function(RED) {
}
setStatusConnected(node, true);
// Remove any existing listeners before resubscribing to avoid duplicates in the event of a re-connection
node.client.removeAllListeners('message');
node._clientRemoveAllListeners('message');
// Re-subscribe to stored topics
for (var s in node.subscriptions) {
@ -704,7 +705,7 @@ module.exports = function(RED) {
if (node.subscriptions[s].hasOwnProperty(r)) {
qos = Math.max(qos,node.subscriptions[s][r].qos);
_options = node.subscriptions[s][r].options;
node.client.on('message',node.subscriptions[s][r].handler);
node._clientOn('message',node.subscriptions[s][r].handler);
}
}
_options.qos = _options.qos || qos;
@ -717,11 +718,11 @@ module.exports = function(RED) {
node.publish(node.birthMessage);
}
});
node.client.on("reconnect", function() {
node._clientOn("reconnect", function() {
setStatusConnecting(node, true);
});
//Broker Disconnect - V5 event
node.client.on("disconnect", function(packet) {
node._clientOn("disconnect", function(packet) {
//Emitted after receiving disconnect packet from broker. MQTT 5.0 feature.
const rc = (packet && packet.properties && packet.reasonCode) || packet.reasonCode;
const rs = packet && packet.properties && packet.properties.reasonString || "";
@ -735,7 +736,7 @@ module.exports = function(RED) {
setStatusDisconnected(node, true);
});
// Register disconnect handlers
node.client.on('close', function () {
node._clientOn('close', function () {
if (node.connected) {
node.connected = false;
node.log(RED._("mqtt.state.disconnected",{broker:(node.clientid?node.clientid+"@":"")+node.brokerurl}));
@ -747,7 +748,7 @@ module.exports = function(RED) {
// Register connect error handler
// The client's own reconnect logic will take care of errors
node.client.on('error', function (error) {
node._clientOn('error', function (error) {
});
}catch(err) {
console.log(err);
@ -763,6 +764,9 @@ module.exports = function(RED) {
node.connecting = false;
node.connected = false;
}
if(node.client) { node._clientRemoveAllListeners(); }
node.connecting = false;
node.connected = false;
callback && typeof callback == "function" && callback();
};
if(!node.client) { return _callback(); }
@ -775,7 +779,7 @@ module.exports = function(RED) {
resolve();
} else {
const t = setTimeout(reject, ms);
client.end(true, () => {
client.end(() => {
clearTimeout(t);
resolve()
});
@ -831,7 +835,7 @@ module.exports = function(RED) {
};
node.subscriptions[topic][ref] = sub;
if (node.connected) {
node.client.on('message',sub.handler);
node._clientOn('message',sub.handler);
node.client.subscribe(topic, options);
}
};
@ -908,9 +912,32 @@ module.exports = function(RED) {
};
node.on('close', function(done) {
node.closing = true;
node.disconnect(done);
node.disconnect(function() {
if(node.client) {
node._clientRemoveAllListeners();
}
done();
});
});
// Helper functions to track the event listners we add to the
// client. The mqtt client also uses it own set of listeners
// so we can't use removeAllListeners() wothout breaking it
node._clientOn = function(event, f) {
node.clientListeners.push({event, f})
node.client.on(event, f)
}
node._clientRemoveAllListeners = function(event) {
node.clientListeners = node.clientListeners.filter((l) => {
if (!event || (event == l.e)) {
node.client.removeListener(l.event, l.f)
return false;
}
else
return true;
})
}
}